Powershift of a dog clutch type vehicle transmission

(19)

(11)

EP 1 167 833 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	14.08.2002 Bulletin 2002/33

(43)	Date of publication A2:
	02.01.2002 Bulletin 2002/01

(21)	Application number: 01109304.4

(22)	Date of filing: 11.04.2001

(51)	International Patent Classification (IPC)⁷: F16H 61/04, B60K 41/10

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

23.06.2000 JP 2000194874

(71)	Applicant: Hitachi, Ltd.
	Chiyoda-ku, Tokyo 101-8010 (JP)

(72)	Inventors:
	Sakamoto, Hiroshi, Hitachi, Ltd., Int. Prop. Gp. Chiyoda-ku, Tokyo 100-8220 (JP) Minowa, Toshimichi, Hitachi, Ltd., Int. Prop. Gp. Chiyoda-ku, Tokyo 100-8220 (JP) Okada, Takashi, Hitachi, Ltd., Int. Prop. Gp. Chiyoda-ku, Tokyo 100-8220 (JP) Kayano, Mitsuo, Hitachi, Ltd., Int. Prop. Gp. Chiyoda-ku, Tokyo 100-8220 (JP) Ochi, Tatsuya, Hitachi, Ltd., Int. Prop. Gp. Chiyoda-ku, Tokyo 100-8220 (JP)

(74)	Representative: Beetz & Partner Patentanwälte
	Steinsdorfstrasse 10 80538 München 80538 München (DE)

(54)	Powershift of a dog clutch type vehicle transmission

(57) A control apparatus and a control method of a powershift in a parallel shaft vehicle transmission, comprising dog clutches are provided for correcting a lowered value of the torque of an output shaft (20) during the gear shifting and adjusting the input shaft (8) speed on the basis of the lowered torque correction. The input shaft (8) torque is adjusted at the termination of the gear shifting on the basis of the lowered torque correction.

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